#include <stdio.h>
int main()
{
	int k,s=0;
	for(k=5;k>0;k--)
	{
		switch(k)
		{
			case 2:
			case 4:s+=1;break;
			case 1:
			case 3:break;
			case 5:s+=2;break;
			default:s+=3;
			
		}
	}
	printf("s=%d\n",s);
	
	
	
	
	return 0;
}